For those of you looking onto on-board systems, have a look at systems that use Cold Fire. Many tracks (VIR, NJMP to name two) already use Cold Fire and what is really good about Cold Fire is that it is bio-degradable and will NOT harm the driver if ingested. You coudl actually drink the stuff.

It doesn't remove oxygen so the driver can still breath. In fact, we point a nozzle directly at the driver to protect him/her.

If you saw the pit lane fire at this year's Indy race, that was Cold Fire.

At NJMP we hosted a demonstration for 13 regional fire departments, and it was amazing how this stuff works. I was already aware of the product, but when you see the stuff in real-life action, it is nothing short of amazing.

http://www.firefreeze.com/ (and no, I don't sell the product... just a believer).